Lol these massive hash jumps are making noob mining impossible because all these guys buying these asic machines. They are buying USED EQUIPMENT on top of that lol....  Their pre ordered machine is plugged in right now mining for the guys who built them......pre order= you paid for the design and manufacture. once its built of course were going to have to test it till we reap 20x its worth then we will ship it. You get it mine for a bit and then its obsolete within 5 months so you gotta buy a new one.... repeat cycle.... anyone not invested into the th range already will never see a ROI period.... mine alt coins trade up to btc do not even attempt to mine btc your wasting valuable time because when these guys decide its time to stop skimming off the purchasers and release them and move on to the next massive miners to repeat this cycle. the only people mining bit coins will be the asic family of 600gh + move to alt coins now while you still have a decent chance.. i would love to see a coin made that cant be farmed CPU ONLY and antibot net. sorry but you missed this boat about 2 years ago.